Brave UI isn't purple in private tabs on android

Description of the issue:
When I enter a private tab in brave, an UI isn’t purple like it should be and looks like in normal tabs.

How can this issue be reproduced?
After using the browser in private tabs for a while, this bug occured in my situtation. You need to enter private tab and go to any website and the bug will appear.

Expected result:
The UI is glitched and isn’t displayed in purple color. Sometimes purple color in UI appears and instantly disappers after scrolling the website.

Brave Version( check About Brave):
Brave 1.69.164, Chromium 128.0.6613.127

Mobile Device details
Samsung A54 Android 14

Additional Information:
To solve the problem you need to clear all browser data in android settings. Clearing cache doesn’t resolve this issue.